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文章以国外某引水隧洞为工程背景,采用理论与数值分析方法,对施工中拟定的爆破参数合理性进行了系统分析,研究表明:基于萨道夫斯基公式计算得出的Ⅱ、Ⅲ类围岩下单段最大药量均大于拟定的爆破参数值;1、4#隧洞间距为25m条件下,爆破引发的既有引水隧洞最大振速满足安全控制基准2.5cm/s的要求,说明施工中拟定的爆破参数是较为合理的,建议可按此参数进行现场施工。
Based on the engineering background of a foreign diversion tunnel, the rationality of the blasting parameters proposed in the construction was systematically analyzed by theoretical and numerical methods. The results show that the type Ⅱ and Ⅲ surrounding rock calculated based on the Sadowssky formula The maximum dose of the next single stage is greater than the proposed value of the blasting parameters; the maximum vibration velocity of the existing diversion tunnel caused by blasting to meet the requirement of 2.5cm / s of safety control under the condition of the distance of 1/4 # tunnel is 25m, Of the blasting parameters is more reasonable, it is recommended to press the parameters of on-site construction.